13 Uplink/Downlink configuration determination procedure for Frame Structure Type 2

36.2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

If the UE is configured with a SCG, the UE shall apply the procedures described in this clause for both MCG and SCG

– When the procedures are applied for MCG, the terms ‘secondary cell’, ‘secondary cells’ , ‘serving cell’, ‘serving cells’ in this clause refer to secondary cell, secondary cells, serving cell, serving cells belonging to the MCG respectively.

– When the procedures are applied for SCG, the terms ‘secondary cell’, ‘secondary cells’, ‘serving cell’, ‘serving cells’ in this clause refer to secondary cell, secondary cells (not including PSCell), serving cell, serving cells belonging to the SCG respectively. The term ‘primary cell’ in this clause refers to the PSCell of the SCG.

For each serving cell

If the UE is not configured with the higher layer parameter EIMTA-MainConfigServCell-r12,

– the UE shall set the UL/DL configuration equal to the UL/DL configuration (i.e., the parameter subframeAssignment) indicated by higher layers.

If the UE is configured by higher layers with the parameter EIMTA-MainConfigServCell-r12, then for each radio frame,

– the UE shall determine eIMTA-UL/DL-configuration as described in Clause 13.1.

– the UE shall set the UL/DL configuration for each radio frame equal to the eIMTA-UL/DL-configuration of that radio frame.

– For a serving cell , a UE is not expected to be configured with parameter harq-ReferenceConfig-r14 if a subframe indicated as an uplink subframe by harq-ReferenceConfig-r14 is not indicated as an uplink subframe by the UL-reference UL/DL configuration if it is configured, otherwise, indicated as uplink subframe by UL/DL configuration.

13.1 UE procedure for determining eIMTA-uplink/downlink configuration

If a UE is configured by higher layers to decode PDCCHs with the CRC scrambled by the eIMTA-RNTI, the UE shall decode the PDCCH according to the combination defined in Table 13.1-1.

Table 13.1-1: PDCCH configured by eIMTA-RNTI

DCI format	Search Space
DCI format 1C	Common

The subframes in which the UE monitors PDCCH with CRC scrambled by eIMTA-RNTI are configured by higher layers.

For each serving cell,

– if T= 10,

– if the UE detects PDCCH with CRC scrambled by eIMTA-RNTI in subframe 0 of a radio frame m or if the UE detects PDCCH with CRC scrambled by eIMTA-RNTI in a subframe other than subframe 0 of a radio frame m-1,

– the eIMTA-UL/DL-configuration for radio frame m is given by the UL/DL configuration indication signalled on the PDCCH as described in [4],

– the UE may assume that the same UL/DL configuration indication is indicated by PDCCH with CRC scrambled by eIMTA-RNTI in subframe 0 of radio frame m and in all the subframes other than subframe 0 of radio frame m-1 in which PDCCH with CRC scrambled by eIMTA-RNTI is monitored,

– otherwise

– the eIMTA-UL/DL-configuration for radio frame m is same as the UL/DL configuration (i.e., the parameter subframeAssignment) indicated by higher layers;

– if T is a value other than 10,

– if the UE detects PDCCH with CRC scrambled by eIMTA-RNTI in a subframe in radio frame mT/10,

– the eIMTA-UL/DL-configuration for radio frames {mT/10+1 , mT/10+2,…. (m + 1)T/10} is given by the UL/DL configuration indication signalled on the PDCCH as described [4],

– the UE may assume that the same UL/DL configuration indication is indicated by PDCCH with CRC scrambled by eIMTA-RNTI in all the subframes of radio frame mT/10 in which PDCCH with CRC scrambled by eIMTA-RNTI is monitored,

– otherwise

– the eIMTA-UL/DL-configuration for radio frames {mT/10+1 , mT/10+2,…. (m +1) T/10} is same as the UL/DL configuration (i.e., the parameter subframeAssignment) indicated by higher layers.

where T denotes the value of parameter eimta-CommandPeriodicity-r12.

For a serving cell , if subframe i is indicated as uplink subframe or a special subframe by higher layer parameter eimta-HARQ-ReferenceConfig-r12, the UE is not expected to receive a PDCCH with CRC scrambled by eIMTA-RNTI containing an UL/DL configuration for serving cell that would indicate subframe i as a downlink subframe.

For a serving cell , if subframe i is indicated as downlink subframe or a special subframe by higher layer parameter subframeAssignment, the UE is not expected to receive a PDCCH with CRC scrambled by eIMTA-RNTI containing an UL/DL configuration for serving cell that would indicate subframe i as an uplink subframe.

For a serving cell , a UE is not expected to be configured with parameter eimta-HARQ-ReferenceConfig-r12 if a subframe indicated as an uplink subframe by eimta-HARQ-ReferenceConfig-r12 is not indicated as an uplink subframe by the UL-reference UL/DL configuration.

If UE is not configured with the parameter EIMTA-MainConfigServCell-r12 for any activated serving cell, the UE is not expected to monitor PDCCH with CRC scrambled by eIMTA-RNTI.

If the UE is configured with the parameter EIMTA-MainConfigServCell-r12 for at least one serving cell, the UE is not expected to monitor PDCCH with CRC scrambled by eIMTA-RNTI outside of the Active Time defined in [8] in order to determine the configured CSI-RS or CSI-IM REs in subframe 6 for CSI reporting purposes. If the UE doesn’t detect an UL/DL configuration indication for radio frame m, the UE determines the configured CSI-RS and CSI-IM REs in subframe 6 according to the UL/DL configuration indicated by higher layer parameter subframeAssignment for the serving cell.